Add generator option '--skip-devise' to skip devise installation
Rails 4.0.0 is out!
Create separate field types for richtext editors
Deprecate richtext options in more friendly way
Update README
Access Railties through Rails::Engine, because of incompatibility with jRuby
Merge branch 'rails-4'

Conflicts:
	lib/generators/rails_admin/templates/initializer.erb
Disallow JRuby failures
Update gemspec
Bump version to 0.5.0
Fix typo in README
Merged in upstream changes for rails 4.